Number of partitions of n into parts of exactly three sorts which are introduced in ascending order such that sorts of adjacent parts are different.

A320545

Number of partitions of n into parts of exactly three sorts which are introduced in ascending order such that sorts of adjacent parts are different.

Terms

    a(0) =1a(1) =4a(2) =12a(3) =31a(4) =73a(5) =165a(6) =357a(7) =760a(8) =1582a(9) =3270a(10) =6678a(11) =13589a(12) =27482a(13) =55468a(14) =111588a(15) =224259a(16) =449908a(17) =902106a(18) =1807173a(19) =3619162a(20) =7244557a(21) =14499238a(22) =29011551a(23) =58044194a(24) =116115782a(25) =232275383a(26) =464607730a(27) =929306306a(28) =1858730674a(29) =3717648658

External references